Ionia Weather Forecast

    • 66
    • 80

    Rain Showers

    • 54
    • 78

    Rain Showers Likely

    • 47
    • 65

    Partly Sunny

    • 62
    • 73

    Chance Rain Showers

    • 63
    • 77

    Chance Rain Showers

    • 59
    • 78

    Rain Showers Likely

    • 53
    • 70

    Slight Chance Rain Showers

Today 12 Sep Ontario

Mostly cloudy. A chance of Showers late. Highs Ranging from the mid 70s on the Hilltops to around 80 across the lower Elevations. South Winds 10 to 15 Mph. Chance of rain 30 percent.

Tonight 12 Sep Ontario

Showers with a chance of Thunderstorms this Evening, then a chance of Showers and Thunderstorms after midnight. A chance of Showers late. Warm with Lows in the mid 60s. South Winds 5 to 10 Mph, becoming southwest. Chance of rain 80 percent.

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  • Temperature Real-Time

Ionia Temperature Statistics

September Temperature

Rochester, Greater Rochester International Airport (15.5 miles)

  • Lowest 7 September, 2026

    50.6 °F

  • Average September

    69.9 °F

  • Highest 2 September, 2026

    85.6 °F

Climate (2021–2026)

Rochester, Greater Rochester International Airport (15.5 miles)

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  • Average Low 2021–2026

    42.3 °F

  • Average 2021–2026

    50.8 °F

  • Average High 2021–2026

    59.5 °F
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